# K151159: Leksell Gamma Knife Perfexion

- Pathway: 510(k) (Traditional)
- Applicant: Elekta Instrument AB
- Decided: Oct 29, 2015 after 181 days
- Product code: IWB (System, Radiation Therapy, Radionuclide)
- Device class: 2
- Regulation: 21 CFR 892.5750
- Recalls of this device: 1 (0 Class I)
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 9 generations back to K926449 (1995). 39 ancestors in all.
4 later devices descend from it; 2 cite it directly.
0 of 44 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K140528: True Beam, True Beam STX, Edge, Varian Medical Systems, Inc. (2014) Summary page 4.
- K133565: Leksell Gamma Knife Perfexion, Elekta Instrument AB (2014) Summary page 4.

## Most influential descendants
- K160440: Leksell Gamma Knife Icon (2016), 3 descendants of its own
- K173789: Leksell Gamma Knife Perfexion, Leksell Gamma Knife Icon (2018), 2 descendants of its own
- K222047: Leksell Gamma Knife Perfexion, Leksell Gamma Knife Icon, Leksell Gamma Knife - Elekta Esprit (New model variant) (2022), 1 descendant of its own
- K250391: Leksell Gamma Knife® (Elekta Esprit); Leksell Gamma Knife® (Icon™); Leksell Gamma Knife® (Perfexion™) (2025), 0 descendants of its own

## Recalls of this device
- Apr 19, 2016 · Class II · Z-1561-2016: The latches of the frame adapter can be locked even if the locating pins of the frame adapter is not inserted into the corresponding holes in the coordinate frame.

## Indications for use
Leksell Gamma Knife® Perfexion™ is a teletherapy device intended for stereotactic irradiation of head structures ranging from very small target sizes of a few millimeters to several centimeters e.g., metastatic tumors, recurrent glioblastomas, trigeminal neuralgia, medically refractory essential tremor, orbital tumors, ocular tumors, optic nerve tumors, benign diseases (such as meningiomas, vestibular schwannomas, post-surgical pituitary adenomas, craniopharyngioma, hemangioblastomas, schwannomas, arteriovenous malformations, cavernous malformations, chordomas, glomus tumors, hemangiomas), skull base tumors, head and neck tumors (such as unknown primary of the head and neck, oral cavity, hypopharynx, oropharynx, nasopharynx, sinonasal, salivary gland), and pediatric tumors (such as glioma, ependymoma, pituitary tumors, hemangioblastoma, craniopharyngioma, meningioma, metastasis, medulloblastoma, nasopharyngeal tumors, arteriovenous malformations, cavernous malformations, skull base tumors).

Source page: https://510kreport.com/device/K151159
Methodology: https://510kreport.com/methodology